What is the difference between TV diagonal and the TV Everbright on Genesis sdf?

I have been looking through Cloudy Nights and Astromart.  I notice that some of the classified ads showed some TV Genesis with "Everbright Diagonals"!  With the word Everbright etched or stickered on.  My diagonal looks exactly the same- but does not say Everbright.

So what is the difference?

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I would suspect if the diagonal is original to the scope it is the enhanced diagonal and not Everbrite. I am not sure if they made the Everbrite when they were making the Genesis. The Genesis I had did not have the Everbrite.

Also, I found out recently that some of the original TV diagonals, I assume they were the enhanced, did not have any sticker or other identification.

My understanding is the difference is in light transmission where the Enhanced is bout 96% and the Everbrite is about 99%. I think the Everbrite surface is a little more durable.

I suspect you would have great eyesight if you could detect the difference in a Genesis between 96% and 99% light transmission.

Call Televue if you want to know for sure. They are great on the phone and Al Nagler may be the one you talk with.